End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

OptionParser::List#reject

reject(t)

# File tmp/rubies/ruby-3.0.5/lib/optparse.rb, line 797
def reject(t)
  @atype.delete(t)
end

See also #prepend #search #get_candidates #summarize also in 3.3 · 3.2 · 3.1